syzkaller login: [ 31.651516] BUG: Bad rss-counter state mm:00000000a0bac57a type:MM_FILEPAGES val:33 [ 31.652553] BUG: Bad rss-counter state mm:00000000a0bac57a type:MM_ANONPAGES val:22 [ 31.817318] ================================================================== [ 31.818230] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.819151] Read of size 8 at addr ffff88800f098ed8 by task sshd/220 [ 31.819904] [ 31.820119] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.821072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.822049] Call Trace: [ 31.822382] [ 31.822665] dump_stack_lvl+0x91/0xf0 [ 31.823149] print_report+0xcc/0x620 [ 31.823626] ? __virt_addr_valid+0x102/0x340 [ 31.824166] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.824777] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.825384] kasan_report+0xbe/0xf0 [ 31.825860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.826487] vma_interval_tree_remove+0xc75/0xec0 [ 31.827085] vma_prepare+0xc54/0x11a0 [ 31.827556] __split_vma+0x5af/0x950 [ 31.828025] ? __pfx___split_vma+0x10/0x10 [ 31.828555] ? find_held_lock+0x2c/0x110 [ 31.829079] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.829645] ? lock_is_held_type+0x9f/0x120 [ 31.830207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.830812] ? mtree_range_walk+0x632/0x900 [ 31.831366] ? mas_walk+0x5c7/0x7c0 [ 31.831838] do_vmi_munmap+0x1f1/0x2b0 [ 31.832329] mmap_region+0x1f9/0x2660 [ 31.832812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.833324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.834061] ? __pfx_lock_acquire+0x10/0x10 [ 31.834591] ? __pfx_mmap_region+0x10/0x10 [ 31.835123] ? security_mmap_addr+0x7d/0xa0 [ 31.835654] ? get_unmapped_area+0x1f5/0x3f0 [ 31.836207] do_mmap+0x854/0xf00 [ 31.836647] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.837151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.837712] ksys_mmap_pgoff+0x3af/0x500 [ 31.838232] do_syscall_64+0x3f/0x90 [ 31.838709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.839359] RIP: 0033:0x7f02088c0d82 [ 31.839813] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.841935] RSP: 002b:00007ffe79c9a628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.842864] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02088c0d82 [ 31.843716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0207cfa000 [ 31.844555] RBP: 00007f0207cfa000 R08: 0000000000000009 R09: 0000000000001000 [ 31.845399] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559819bb3d90 [ 31.846254] R13: 00007ffe79c9a640 R14: 00007ffe79c9a670 R15: 00007ffe79c9a9d0 [ 31.847117] [ 31.847416] [ 31.847632] Allocated by task 213: [ 31.848060] kasan_save_stack+0x22/0x50 [ 31.848558] kasan_set_track+0x25/0x30 [ 31.849051] __kasan_slab_alloc+0x59/0x70 [ 31.849573] kmem_cache_alloc+0x16b/0x370 [ 31.850111] vm_area_dup+0x20/0x160 [ 31.850567] __split_vma+0x170/0x950 [ 31.851033] split_vma+0xc6/0x110 [ 31.851480] mprotect_fixup+0x8d2/0xb30 [ 31.851988] do_mprotect_pkey+0x87e/0xd40 [ 31.852509] __x64_sys_mprotect+0x78/0xc0 [ 31.853039] do_syscall_64+0x3f/0x90 [ 31.853507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.854163] [ 31.854381] Freed by task 213: [ 31.854775] kasan_save_stack+0x22/0x50 [ 31.855278] kasan_set_track+0x25/0x30 [ 31.855769] kasan_save_free_info+0x2b/0x50 [ 31.856300] __kasan_slab_free+0x10a/0x190 [ 31.856834] kmem_cache_free+0x10d/0x4d0 [ 31.857341] rcu_core+0x8c8/0x2860 [ 31.857793] __do_softirq+0x1b7/0x7d4 [ 31.858284] [ 31.858499] Last potentially related work creation: [ 31.859090] kasan_save_stack+0x22/0x50 [ 31.859591] __kasan_record_aux_stack+0x8e/0xa0 [ 31.860168] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.860810] remove_vma+0x139/0x170 [ 31.861265] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.861820] do_vmi_munmap+0x1f1/0x2b0 [ 31.862320] __vm_munmap+0x138/0x3a0 [ 31.862788] __x64_sys_munmap+0x59/0x80 [ 31.863284] do_syscall_64+0x3f/0x90 [ 31.863755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.864396] [ 31.864611] The buggy address belongs to the object at ffff88800f098e80 [ 31.864611] which belongs to the cache vm_area_struct of size 168 [ 31.866096] The buggy address is located 88 bytes inside of [ 31.866096] freed 168-byte region [ffff88800f098e80, ffff88800f098f28) [ 31.867508] [ 31.867726] The buggy address belongs to the physical page: [ 31.868375] page:00000000521ba015 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf098 [ 31.869451] memcg:ffff888019aff701 [ 31.869878] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.870521] page_type: 0xffffffff() [ 31.870975] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.871883] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019aff701 [ 31.872785] page dumped because: kasan: bad access detected [ 31.873447] [ 31.873662] Memory state around the buggy address: [ 31.874257] ffff88800f098d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.875120] ffff88800f098e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.875979] >ffff88800f098e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.876825] ^ [ 31.877555] ffff88800f098f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.878426] ffff88800f098f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.879278] ================================================================== [ 31.880240] Disabling lock debugging due to kernel taint [ 34.513203] BUG: Bad rss-counter state mm:000000009c178461 type:MM_FILEPAGES val:33 [ 34.514297] BUG: Bad rss-counter state mm:000000009c178461 type:MM_ANONPAGES val:22 [ 35.009450] BUG: Bad rss-counter state mm:00000000e875d3fe type:MM_FILEPAGES val:33 [ 35.010567] BUG: Bad rss-counter state mm:00000000e875d3fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1214' (ECDSA) to the list of known hosts. 2023/06/19 14:24:56 fuzzer started 2023/06/19 14:24:56 dialing manager at localhost:44161 2023/06/19 14:24:56 checking machine... 2023/06/19 14:24:56 checking revisions... [ 35.768285] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:24:56 testing simple program... [ 35.813325] cgroup: Unknown subsys name 'net' [ 35.868785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:55 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=ffffffff81b2b79e RDX=0000000000000000 RSI=0000000000000100 RDI=0000000000000080 RBP=ffff88801964be20 RSP=ffff88800efff840 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888018196d00 R13=0000000000000100 R14=ffff888010052000 R15=ffff88801964bbac RIP=ffffffff814c0388 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2c975f6700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8f6964ca00 CR3=000000000eb12000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2035353a34323a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f030000 RSI=ffffffff810ac51d RDI=0000000000000001 RBP=ffff88800f030000 RSP=ffff88800edf7ed0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800edf7f58 R13=0000000000000000 R14=000055ac6957d734 R15=0000000000000000 RIP=ffffffff814c081b RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6ca532e900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055ac6957d734 CR3=00000000164dc000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=0000000000000000000055ac68a16060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000